import java.util.Scanner;

public class Text2 {
    public static void main(String[] args) {
        Scanner Sc = new Scanner(System.in);
        //int n=Sc.nextInt();
        while(Sc.hasNextInt()){
            int n=Sc.nextInt();
            int count=0;
            while(n!=0){
                if ((n&1)==1){
                    count++;
                }
                n=n>>1;
            }
            System.out.println(count);
        }
    }
}
